* In :mod:`IPython.kernel.launcher` we were not handling the lookup of
``job.exe`` properly on Windows if the HPC pack was not installed.
* When :mod:`IPython.kernel.client` was imported, Twisted was giving
warnings that we have silenced.

* The test suite has been ported to use the new APIs.
* The test suite runs and passes on all platforms!!!
* The IPython Sphinx directive has been updated to use the new APIs.
* %history works again.
* New %tb magic for showing last traceback.
* Significant design improvements in the config loaders and applications.
* Zillions of bugs fixed.
* Completely new %pylab implementation that uses the new GUI support.
This allows pylab to be enabled *at runtime*.
* Many other things.